The engineering problems in oral implantology are discussed in this paper. The problems discussed include the comparison among implants of different shapes, the influence of lengths and diameters of implants on the biomechanics properties of interface, the influence of pitches and tooth angles of threaded implants on the biomechanics properties of interface, the influence of methods of surface treatment and surface topography of implants on the biomechanics properties of interface, the characteristics of implant denture design, the application of picture treatment technology and solid model manufacturing technology in implant denture reconstruction.